You may want to check with the CRA to determine what information they have on file for him.
Ensure that his residency status has been applied correctly.
- How to determine residency status -https://turbotax.community.intuit.ca/replies/2647682
Please go back to your provincial section and delete the claim for CAI credit, as you must be a resident of Canada to claim it.
- Under Provincial Tax Credit, it will be there for you to UNCHECK the Climate Action Incentive Credit box and double check that you have not claimed anything within that section of the return.
Once you have corrected these entries, you will be able to proceed.